19W5fsWqQ87CNE4versRVmvywXzHX2pDn

P2PKH (1)

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Quantum exposure Always-exposed

P2PK · always-exposed

P2PK outputs carry the public key directly in the output script. The pubkey has been visible on chain since the moment this address was first funded. A sufficiently powerful quantum computer running Shor's algorithm against secp256k1 could derive the private key from the visible pubkey.

First revealed at block 168,192 on 2012-02-24 (p2pk_output).

Context: Bitcoin quantum exposure report · Top exposed addresses · Quantum and Bitcoin (LearnBitcoin.com)

What we know about this address 3 findings ✓ corroborated by 3 sources

eclipsemc reward address (coinbase-extracted)

Received block rewards as part of eclipsemc's coinbase output across 1 block(s) between heights 168192 and 168192. Attribution derived from on-chain coinbase scriptSig tag matching plus Jameson Lopp's blocks.csv mapping; this is hard evidence the address received pool rewards under that pool's signature, not clustering inference.

mining-pool view
WatchYourBack: mining:eclipsemc

Tagged as 'mining' (subcategory: eclipsemc) in the WatchYourBack tagging dataset. Sub-source: miner. File: graphsense-tagpacks/20220510_graphsense_miners.tags.

mining pool view
miners

Tagged as 'miners' in GraphSense pack 'miners' (category: miner, confidence: forensic). Cited source: https://github.com/MatteoRomiti/Deep_Dive_BTC_Mining_Pools/blob/master/dataset/miners.json

mining pool view